Burglar-alarm.



W. H. GETTZ & E. C. POSTER.

BURGLAR ALARM.

APPLICATION FILED 001'. 17, 1913.

1,105,899, Patented Aug. 4, 1914,

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WITNESSES: mmyroms Q mzzi mfiaeig, Ida/anal 611 0628)!- W. H. GETTZ & E.G. FOSTER.

BURGLAR ALARM.

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WILLIAM H. GETTZ, 0F PHILADELPHIA,PENNSYLVANIA, ANDEDWARD G. FOSTER, 01?

PITMAN, NEW JERSEY, ASSIGNOBS OF (ENE-THIRD TO WILLIAM EMALLOWAY, 0F

PHILADELPHIA, PENNSYLVANIA.

BURGLAR-ALARM.

Specification of Letters Patent.

Application filcd October 17, 1913. Serial N 0. 795,630.

1 b all whom it may concern:

invented certain new and useful Improvements in Burglar-Alarms, of whichthe following is a specification.

7 Our invention relates to improvements in burglaralarms, and moreparticularly to burglar alarms of the detonating type, the object of theinvention being to provide improved means operated when a window or door1s opened to cause the operation of a plunger and the dischargeof ablank cartridge.

A further object is to provide improvements of this character which areextremely simple in construction, which do not disfig ure a doororvwindow, and which can be.

placed in operative position by any ordinary householder not requiringskilled labor for the purpose.

With these and other objects in view, invention consists in certainnovel features of construction and combinations and arrangements ofparts, as will be more fully.

hereinafter described claims. 1

In the accompanying drawings: Figure 1 is a fragmentary perspective viewillustrating our improvements as applied to a window. Fig.2 is a view inelevation of the device with the outer casing removed. F ig- 3 is a viewin section. on the line 33 of Fig. 2. Fig. 4 is a view in elevationillustrating our:improvements as applied to a door. F is a viewinelevation atright and pointed out in the angles to Fig. 4. Fig. 6 is aView in clevaw tion of the construction shown in Fig. 4t but omittingthe removable outer casing. Fig. 7 is a view in section on the line 77of Fig 6. Fig. 8 is a view in transverse section on the line 8-8 of Fig.6. Fig. 9 is a view in elevation illustratingthe pivoted dog 31.

Referring to the construction illustrated in Figs. 1, 2, and 3, 1represents a window frame and 2 an ordinary sliding window sash to whichlatter a base plates is secured the i by screws 4. The base plate 3 atits upper and lower ends is provided with outwardly Patented Aug.4,1914.

projecting flanges 5 and 6 respectively and at its lower end is formedwith an integral barrel 7 adapted to receive an ordinary blank cartridge8 and hold the same in posi tion to be engaged by the pointed end 9 of aplunger 10. slide in bearings 11. integral with base plate 3, and isprovided between said bearings with a coiled The plunger 10 is mountedto i spring 12, the upper end of a which bears against the upper bearinggll,

and the lower end bears against a cross pin 13 projected through anopening 14 in the plunger, and one end of which is preferably longerthan the otherand is adapted to be a manually manipulatodto remove theplunger as will hereinafter appear. The shorter end of the pin 18 isadapted to be engaged by a tripping lever 15 pivotallysupported betweenits ends on a pin 16 secured in base v 3, and said lever 15 is connectedby a coiled spring 17 with the upper flange 5 so as to hold the lever innormal position. One end of this lever 15 of the sash projects beyond athe edge and is adapted when the sashis; f

elevated to engage a block 18 fixed to the frame 1, so that the trippinglever will be caused to pivot and its inner end engaging pin 13 Wlllelevate the plunger 10 against the action of spring 12 until the lever15 1 rules oil the end of the pin, when the spring 12 will force theplunger downwardly and discharge the cartridge. A removableicasing 19 ispositioned over the base 3, and this a casing 15 provided in one sidewith an open- 1ng29, through which pin 13 projects, one a wall of thisopening 19 having notches 20 therein in which the pin. 13 may be movedto lock the plunger inan. elevated position and out of the way oftripping lever 15. This is desirable when placing a new. cartridgc inthe barrel 7, and is also desirable during the day when the alarm is notset. An opening 21 is provided in. the casing 19,

so that a cartridge may be readily inserted;

or removed without removing the casing.

In the construction illustrated in Figse to 9 inclusive, we employ abase plate 3 which is secured by screws are a door 23,.

and this base plate 3 has flangcs fiand 6,

barrel 7, and bearings 11, the same as in the form. first described. Inthe bearings '11, the plunger is mounted and pressed downwardly by thespring 12 to force the pointed end 9 into contact with the car- A pin 13projects through the "tridge 8.

. plunger 10 andis adapted to be manipulated to manually operate theplunger. A bracket oi the-lever 27 engages a pivoted dog 31, the

25 is fixed to base 3 and is provided at its upper end with a vertical.pin 26 on which i horizontally swinging trippinglever 27 is pivotallysupported between its ends. A

spring 28 is secured at its lower end by a screw to base 3 and exerts apressure on one end of leverQ'Z to hold the latter in .norinalposition,and when the device is set,

the plunger 10" will be moved upwardly and the pin '13 positioned overthe upper surface of the inner end or lever 27. The inner .end of lever27 1s beveled at one side as "shownxat 30, so that the pin 13 may bereadily elevated pastthe lever, torcingthe latter outwardly until thepin reaches the proper height, when the spring 28 will move the "leverbaclrunder the pin. The outer end latterfha'ving a beveled upper end 32over which the lever engages when the door inoves to-closed position,thedog pivoting to allow such movement. A ain-"33 acts as j a stop tolimit the pivotal movement of the dog in the opposite direction, so thatwhen the door is opened, the dog 31 cannot pivot to allow the lever 27to pass, hence the lever 27 isswung on the pivot 26 and pin l3',isrel-eased, allowing the plunger to be forced downwardly by the spring 11and discharge the cartridge. The dog 31 is supported by bracket-3i fixedto a block 35 on-the door f lo 't'ranie3 6 and inproper position to beengaged by the lever 27. A removable'casing 37, corresponding to casing19, is connected "to the base3 and'is provided with suitable openingsand covers the working parts or the device.

- t It will be noted that in both'formsof our invention, the opening ofthe door or window causes the operation of the plunger and the dischargeof the cartridge, thus giving,

alarm to the householders as well as fright x ening the burglar.

.Va'riou's slightchang'es might be made in the general formandarrangement of parts described with'out departing from our invention,and hence we do not limit ourselves tothe precise details set forth, butconsider ourselves at liberty to make such changes and alterations asfairly fall Within the spitri t and scope of the appended claims.

, Having thus described our inventiomwhat we cl'aimas new an'd desireto-secure by Let .ilters Patent is: I

1. A burglar alarm of the character clescribed, comprising a base, abarrel integral {with the base and adapted to support substantially asdescribed.

cartridge, bearings on the base in line with the barrel, and a plungermounted in said bearings,- ot' a pin projected through an opening in theplunger, a coiled'spring around the plunger between one ofthebearingsand said pin, and a s'pringi-held tripping lever tor holding andcontrolling the release of the pin and the operation ofthe plunger,substantially as described.

2. A burglaryalarm of the character. de

scribed, comprising a base, a barrel integral with thebase and adaptedto support a cartridge, bearings on'the base in line with the barrel,and a plunger mounted in said bearings, of a pin projected through anopening in the plunger, acoiled spring around the plunger between oneofthe bearings and said pin, apivoted tripping lever on the base, aspring holding sa1d tripplng lever in normal position, and means engagedby the tripping lever to, cause the release of the pin and the operationof the plunger,

3. A burglar alarm of I the character de-' scribed, comprising a base, abarrel integral -with the base and adapted to support ,a cartridge,bearings on the base in line with the barrel, and a plunger mounted insaid bearings, ofa pinprojected through an-- opening in the plunger, aco1ledspr1ng around the plunger between one of the bearings and saidpin, a pivoted trippinglever on the base, a springholdingsaid trippinglever in" normal position,n1eansengaged by the'tripping'lever ,to'causethe; release of the pin and the operation of the plunger, said basehaving flanges at itsupper and lower substantially as described.

l. A burglar alarm comprising a base, a vertically disposed barrel onthe base adapted to r'ecei'veqa cartridge, bearings on the base in linewith thebarrel, a spring-pressed plunger in said bearings, and a pinproject-i ing through the plunger, of a horizontally end, and a casingfitting over said flanges,

swinging tripping lever over oneend 07E which'said pin' is adapted to bepositioned to support the plunger in an elevated position, and a pivoteddog adapted to be enga'ged by the trippinglever to swing the latter outof the path of the pin and permit the plunger tomovedownwardly anddischarge the cartridge, substantially as described. i

5. A burglar alarm comprising .a base, a

the path of the pin and permit the plunger names to this specificationin the presence to move downwardly and discharge the carof twosubscribing witnesses.

trid 'e said lever having a beveled inner end and a springsecured to thebase and engag WILLIAM GETTZ' 5 ing said inner end of the lever, holdingthe EDVARD latter in normal position, substantially as Witnesses:described. JOSEPH W. CURRY,

In testimony whereof, we have signed our ELLA L. BATES.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of latentl a Washington, D. G.

